A Prophetic Treatment for Nightmares!

Muhammad ibn al-Munkadir reported that a man came to the Prophet, Peace Be upon Him, and complained that he sees terrible nightmares in his sleep. The Prophet, Peace Be upon Him said: When you go to bed say: 'I seek refuge with the complete words of Allah from His anger and His punishment and the evil of His servants, and from the evil suggestions of the shayatin and from their being present (at death).'

Silsilah al-aHaadeeth as-Saheeha by shaykh al Albaanee (264)